var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var compression = require('compression')

var http = require('http');
var ws = require('socket.io');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var adminRouter = require('./routes/admin');

var app = express();

const server = http.createServer(app).listen(8881);

const io = ws(server);

io.on('connection', socket => {
  let group = '';
  socket.on('group', data => {
    socket.join(data);
    group = data;
  })
  socket.on('message', data => {
    io.sockets.in(group).emit('mes', data);
  })
})

// 解决跨域问题
app.all('*', function (req, res, next) {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Headers', 'Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild');
  res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,DELETE,OPTIONS');
  if (req.method == 'OPTIONS') {
    res.send(200);
  } else {
    next();
  }
})

app.use(compression())

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public'), { maxAge: 86400000 }));

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/admin', adminRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
